Spotlight projecting machine



A. J. OBERG ETAL SPOTLIGHT PROJECTING MACHINE Filed Feb. 29, 1928ATTORNEY.

Patented Dec. 8, 1931 v[narran STATE-s PATENroFFICE l.ANTON J'. OBERGANDVROBERT It. STGEFEN, OF LOS ANGELES, CALIFORNIA SPOTLIGHT BROJ'ECTINGMACHNE Appneanon med retruary 29, 192e.l seria; No. 258,065.

. This invention relates to spotlights par.- ticularly useful, fortheatrical purposes and the general object of the invention is to projvide an improved spotlight projecting machine for producing spotlightsof different designs in various colors, which machine may be readily andaccurately adjusted to focus the light, and l taken apart. I Y A moreparticular object is to provide a spotlight machine "with improvedVentilating means to prevent overheating'thereof'.v

' Aiurtheriobject is to provide a spotlight machine of the characterstated which will be simpleV in constructionand highly efficient` inoperation. A

The invention is illustrated in the annexed drawings which form a partof this4 speci* fication and 4in which: Figure 1 is a perspective Viewof my snot* light machine with the casing' partly broken away to showthe mechanism of the machine. .Figure 2 is a fragmentary crosssection ofthe casing as seen where Vbroken away in the right hand portion ofFigure1.

Figure 3`is a fragmentary rear viewof the reflector and its adjustingmeans.

Corresponding-'parts are Vdesignated by the same reference characters inall the Vfigures. Our invention includes 'generally a casing 1, a slideholder 2, a reflector 3, a projecting light 4, a magnifying lens 5, amulticolored transparent wheel 6, `a blower 7, and a motor8. A. i Thecasing 1 ismade in two sections, a lower section 9 and an upper section10, the upper section being'longitudinally slidably mounted ,on thelower section by means of' slide. jointsll on the side upper and loweredges ofv said lower Vand upper sections. The joints 11 are formed bybending the upper side edges of the lower section) first outwardly at12, then upwardly at 13, thenl inwardly at' 14, and then downwardly Vat15,

and by bending the lower side edges ofV the upper section 1() firstoutwardly at 16 andV then upwardly at 17. Thebent portion 12 of lowersection 9 forms a shoulder upon which slidably rests the lower edgeportion 16 of may be readily assembled orr upper section 10, while theportions 15 and 17 intcrengage to hold the upper section 1() in slidingrelation on the lower section (see Figure 2). The upper edge of theforward end of the lower section 9 of' the casing is formed with anexternal flange 18 while the lower '55.`V

edge of the forward end of the upper section 10 is formedwith aninturned flange 19 which engages the undei` side of the flange 18 whenthe upper section is retracted on the lower f section. A lens 2() isprovided in the front 3 end wall of the upper section 10 of the casing9.

In the frontend of the lower casing section 9 is secured a frame 21formed with a base v 22 and a .pair of upstanding vertical members .5 23and 24. A bar 25 which may be'square in cross section is secured at itsforward end to the frame member 24 while the rear end of said barextends into a sleeve 26, in the rear end of which sleeve is secured ascrew block 27 with which a screw 28 engages which screw extends throughand is journaled in the rear end wall of' the lower casing member 9therebeing a pair of washers 29 and 3() secured on said screw which washersengage the inner and outer sides of said rear end wall. A thumb wheel30is secured on the rear outer end of the screw 28 for turning thesame.The screw 28 and sleeve 26 support the rear end of the bar 25. On the 8outer end of the screw block 27 is secured a bearing plate 31formedlwith a plurality of bearings 32, 33, 24 and 25, through whichextend adjusting rods 36, 37, 38 and 39 respectively for the slideholder 2, reflector 3, light u 4 and magnifying lens 5.

vTheslide/holder 2 is formed with a sup` porting member 40 and a sleeve41 which slides on the sleeve 26,V whereby the slide member is slidablymounted on the sleeve 26. On the sleeve 41 is formed a lug 42 throughwhich extends the inner threaded end 43 of the adjusting rod'36, saidthreadedend being in threaded engagement with said lug. The slide holder2 exten ds transversely of the upper section V10V of the casing 1 and isformed with plates 44 at its ends which cover atall times openings 45 inthe side walls fof said upper section, allowing for a short adjusting orfocusing movement of the slide holder lon- Yea gitudinally of the casingwithout escapement of any light from the casing through said openings.rlhc rear end of the rod 36 extends through the rear end wall of thelower section 9 of the casing l and a knob 46 is secured on the rear endof said rod. A pair of washers ll7 and 48 are secured on the rod 36 inengagement with opposite sides of the plate 3l so that when the rod isturned one way or the other the engagement of the screw end t3 of saidrod causes the slide holder 2 to be adj usted forwardly or backwardly.The slide holder is provided with the usual light openings 2m and 2?) inits rear and front walls respectively through which openings light isprojected by the light la The reflector 3 is mounted on an arm 50 formedwith a sleeve 5l which is slidably mounted on the sleeve 26, therefiector being formed at its rear with a stud 52 which projects througha vertical slot 58 in the arm 50 and is threaded to receive a nut 54,there being a washer 55 fitted on the stud against the rea-r face of thearm against which washer the nut 5d binds for adjustably securing thereflector on the arm for vertical adjustment. ri lug 55 projectsrearwardly from the upier edge of the reflector, through which lug ascrew 56 extends which screw engages the upper end of the arm 50, therebeing a shoulder 57 and a collar 58 on said screw engaging the upper andlower sides respectively of the lug` whereby, upon turning the screw 56the reflector is adjusted vertically either upwardly or downwardly. Theinner end of the rod is threaded at 59 for engaging the arm 50 wherebysaid arm and the reflector 3 may be adjusted longitudinally of thecasing l or towards or away -from the light fl and slide 2. Washers 6()and 6l are secured on the rod 37 adjacent opposite sides ofthe plate Sifor holding the rod against longitudinal. movement so that its screw mayadjust the arm 50 and reflector 3. A thumb wheel 62 is secured on theouter rear end of the rod 37 for turning the same.

The base 62E is secured on a sleeve 6ft slidably mounted on the sleeve26 and a lug 65 depends from the sleeve 6st which lug `is engaged by thethreaded end 66 of the rod 3S. A pair of washers 67 and 66 are securedon the rod 38 adjacent opposite sides respectively ofthe plate 3l sothat upon turning the rod the threaded end 66 engaging the lng 65 willcause the sleeve 64e and light s@ to be adjusted longitudinallyV of thecasing l or toward A thumb wheel 69 is secured on the outer rear end ofthe rod 38 for turning the same.

The magnifying lens 5 is mounted on a sleeve 70 which is slidablymounted on the sleeve 26 and is formed with a lug 7l which is inthreaded engagement with the threaded end 72 of rod Collars 7 3 aresecured on the rod 39 in engagement with the plate 3l to hold the rodagainst longitudinal movement but to allow the rod to turn so that itsthreaded end 72 engaging lug 7l will adjust the sleeve 70 and lens 5longitudinally toward or away from the slide 2 and color wheel 6. Athumb wheel 74 is secured on the outer rear end of the rod 39 forturning the rod.

The coloil wheel 6 is divided into a plurality of sectors 75 ofdifferent colors. The wheel is secured on a shaft 76 which is journaledin bearings 77 and 7 8 on the upper ends of members 23 and 24Erespectively of frame 21. A worm wheel 79 is secured on the color wheelshaft 76 in mesh with a worm 80 on the upper end of a vertical shaft 8ljournaled in hearings 82 and S3 on the frame member 24. A worm wheel 84is secured on the lower end of shaft 8l in mesh with a worm 85 on theshaft S6 of motor 8.

The inlet 87 of the blower 7 extends from the atmosphere through thebottom wall of the lower section of the casing l and the upper section10 of the casing is constructed with a ventilator 8S in the top thereofso that air drawn into the casing through said inlet after circulatingthrough the casing may escape through saidV ventilator.

The operation of my invention is as follows: rlhe slide holder 2reflector 3, light 4, and lens 5 being properly adjusted, a slide 90 offigured or lettered glass is introduced from one side of the casingthrough an opening 45 into the slide holder 2. The light 4 being lightedand the motor 8 put in operation, air is circulated by the blower 7through the cas ing and the color wheel 6 rotated by the motor throughthe medium of motor shaft 86, worm 85, worm gear shaft 8l, worm 80, wormgear 79 and shaft 76. The design of the slide 9() is projected by thelight of light 4., reflected by reflector' 3 through the openings 2a and2?) of the slide holder 2 through the magnifying lens 5, color wheel 6and lens 20 and the rotation of the wheel 6 bringing the differentcolored sectors 75 thereof successively across the projected lightproduces a novel varigated spotlight projected through the lens 20.

le claim as our invention A spotlight projecting machine comprising afront lense, a condenser lense spaced rearwardly of said front lense, atranslucent color element positioned between said lens, said elementhaving differently colored areas progressively movable across the fieldof vision, an image-forming translucent member spaced rearwardly of saidcondensing lense, and a source of light located rearwardly of saidmember to project light therethrough.

In testimony whereof we afiix our signatures.

ANTON J. OBERG. ROBERT R. STOEFEN.

